#include<stdio.h>
#include<sys/types.h>
#include<unistd.h>

int main()
{
  pid_t id = fork();
  if(id == 0)
  {
    //child
    while(1)
    {
      printf("我是一个子进程，pid：%d,ppif:%d\n",getpid(),getppid());
      sleep(1);
    }
  }
  else
  {
    //father
    int cnt = 5;
    while(cnt){ 
     printf("我是父进程，pid：%d,ppid:%d\n",getpid(),getppid());
     cnt--;
     sleep(1);
    }
  }
  return 0;
}
